Do you realize that there are different types of workouts, that focus specific types of muscles to create a certain build? The woman physique you talk about is obtained by focusing glutes, legs and shoulders with big weights and high repetition to acquire muscle mass, leaving the other muscles (that provide a more manly physique like the back and biceps) with high repetition but low weights to tone the muscle. Even though this is the ideal female physique that is considered attractive, women can train the "male" muscles to get bigger and look more "manly" for different reasons (be it fighting, bodybuilding, personal aesthetic they want to achieve, etc.), but that doesn't mean they have to use testosterones to achieve it. I bet you huge amounts of money that if any woman did triceps, shoulders and back exercises three times a week with big weights and she is consistent (no need to be an athlete, plenty of people go to the gym three times a week as part of their routine), she can easily obtain the Ellie build you are criticizing as being unachievable to women without testoterones.
It all depends on the workout you do, and believe me that smashing people with a bat uses a lot the shoulder muscle, just as you need pectorals to choke motherfuckers to death with your forearm, Ellie having this physique is nothing extraordinary taking into account what she has to go through in her world. The fact that you don't understand this just goes to show how little you actually know about muscles building and workouts.